Question

power tools can be powered by _______, such as in a nail gun, or by a gasoline engine, such as in a portable compressor. select one: a. battery b. power cord c. airflow d. burning of propellant

Explanation:

Nail guns are often powered by compressed air (airflow). Power - cord and battery are not typical for nail guns as described here, and burning of propellant is not a common power source for such common power tools. Portable compressors can use gasoline engines, and nail guns can use airflow from compressors.

Answer:

C. Airflow